<template>
  <div id="app">
    <div>
      <span>姓名:</span>
      <input type="text" v-model="obj.name" />
    </div>
    <div>
      <span>年龄:</span>
      <input type="number" v-model="obj.age" />
    </div>
    <div>
      <span>性别:</span>
      <select v-model="obj.sex">
        <option value="男">男</option>
        <option value="女">女</option>
      </select>
    </div>
    <div>
      <button @click="addFn">添加/修改</button>
    </div>
    <div>
      <table border="1" cellpadding="10" cellspacing="0">
        <tr v-show="arr.length === 0 ? false : true">
          <th>序号</th>
          <th>姓名</th>
          <th>年龄</th>
          <th>性别</th>
          <th>操作</th>
        </tr>
        <tr v-for="(item, i) in arr" :key="i">
          <td>{{ i + 1 }}</td>
          <td>{{ item.name }}</td>
          <td>{{ item.age }}</td>
          <td>{{ item.sex }}</td>
          <td>
            <button @click="delFn(i + 1)">删除</button>
            <button @click="editFn(item, i)">编辑</button>
          </td>
        </tr>
      </table>
    </div>
  </div>
</template>
<script>
export default {
  data() {
    return {
      arr: [
        {
          id: 1,
          name: "Tom",
          age: 19,
          sex: "男",
        },
        {
          id: 2,
          name: "Jone",
          age: 21,
          sex: "女",
        },
      ],
      obj: {
        name: "",
        age: 0,
        sex: "",
      },
      flag: true,
      num: null,
    };
  },
  methods: {
    addFn() {
      if (
        this.obj.name.trim().length == 0 ||
        this.obj.age === "" ||
        this.obj.sex == ""
      ) {
        alert("不能为空");
        return;
      }
      if (this.flag) {
        this.arr.push(this.obj);
      } else {
        this.arr[this.num] = this.obj;
        this.flag = true;
      }
      this.obj = {
        name: "",
        age: 0,
        sex: "",
      };
    },
    editFn(item, index) {
      this.flag = false;
      this.obj = JSON.parse(JSON.stringify(item));
      this.num = index;
    },
    delFn(index) {
      this.arr = this.arr.filter((item) => item.id !== index);
    },
  },
};
</script>
